One consultant suggests that “the definition of leadership ethics is still unclear; its scope is broadening, making it a moving target.” This is not good news for the topic. Fortunately, the field may be making the task of definition unduly arduous. Scholarship is needed to ferret through the debris so a concept of ethical leadership can be constructed that is both academically rigorous and of use to practitioners, whether in advising and “doing” ethical leadership.
The complete essay is at "Toward a Definition for Ethical Leadership" For more, see also The Essence of Leadership at Amazon.